science-softCon uv/vis+ photochemistry database; www.photochemistry.org; (C) science-softCon 2019 Substance: 1,3-butadiyne Other Names: diacetylene Formula: C4H2 CAS-No.: 460-12-8 Study: UV absorption cross sections Authors: A. Fahr, A.K. Nayak Title: Temperature dependent ultraviolet absorption cross sections of 1,3-butadiene and butadiyne Journal/Source: Chem. Phys., 189, 725-731, (1994); http://dx.doi.org/10.1016/0301-0104(94)00306-8 Data: table, diagram Energy/Wavelength range: 160 - 240 nm Resolution: Temperature: 333 K, 313 K, 295 K, 273 K, 253 K, 233 K, 223 K Temperature dependence: yes Pressure/Concentration: Phase: gas pH: Comments: The spectrum for butadiyne consists of a very strong absorption at 164.6 nm with a cross section of 4.40 x 10^-16 cm2, at 295 K followed by the complex absorption features between about 200 to 250 nm. The cross section values at absorption peaks determined at low temperatures are significantly higher than those at higher temperatures. Author to whom correspondence should be addressed: (e-mail address):